Same thing they do in the video game development forums, and go "Here's my project, here's where it's at, the input I want is thus-and-so, I'll update as it develops".
Basically, public design and development threads. Which...
Like, on the one side, those can get awful market-ing-y, for sure, especially if they keep being updated post-release, which is contrary to keeping marketing in the stickies.
But at the same time, we seem to have a LOT of subforums for design, which suggests the expectation of a lot of threads on design for each subtype, which makes me go "Maybe project development threads up to the point of release are intended to be a thing?"